Even though it can be hard, tell at least one person ( that you've stopped drinking ) or more, in each area of your life (work, home, friends) someone who you think can be trusted, and whose opinion matters to you.
Ask them for their support when needed and report your progress.
It helps you to stay honest, until you arrive at a spot where you don't want to let YOURSELF down.
Also quit for yourself, ...not others, so that you don't rebel and drink just out of defiance and opposition.
Be compassionate with yourself. Alcohol has temporarily altered our brain, and this is HARD. ...BUT do not use this as an excuse to not quit.
Whoever you are, whatever your circumstances, there are people who have less to work with and more difficult circumstances to overcome who STILL quit. Make up your mind that there will never be a good enough reason to give up on yourself.